Method undo

Engine/source/environment/editors/guiRiverEditorCtrl.cpp:111–144

}

void GuiRiverEditorUndoAction::undo()
{
   River *river = NULL;
   if ( !Sim::findObject( mObjId, river ) )
      return;

   // Temporarily save the Rivers current data.
   F32 metersPerSeg = river->mMetersPerSegment;
   Vector<RiverNode> nodes;   
   nodes.merge( river->mNodes );

   // Restore the River properties saved in the UndoAction
   river->mMetersPerSegment = mMetersPerSegment;

   // Restore the Nodes saved in the UndoAction
   river->mNodes.clear();
   for ( U32 i = 0; i < mNodes.size(); i++ )
   {
      river->_addNode( mNodes[i].point, mNodes[i].width, mNodes[i].depth, mNodes[i].normal );      
   }

   // Regenerate the River
   river->regenerate();

   // If applicable set the selected River and node
   mRiverEditor->mSelRiver = river;
   mRiverEditor->mSelNode = -1;

   // Now save the previous River data in this UndoAction
   // since an undo action must become a redo action and vice-versa
   mMetersPerSegment = metersPerSeg;
   mNodes.clear();
   mNodes.merge( nodes );
}

bool GuiRiverEditorCtrl::onAdd()
{